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jQuery Form IE8

in Using jQuery Plugins • 7 years ago

Hello everyone. I'm trying to submit a form via AJAX that contains a "file" input (upload) and have cross-browser support (including IE8). I have tried using a polyfill for the FormData object, but even with that, IE8 cannot send the form properly to my endpoint.

I found this plugin (jQuery.form) and decided I would give it a try. It seems to work except that in IE8, it throws an error and asks the user if they would like to debug. I am using the plugin the following way:

$('#import-form').ajaxSubmit({
url: window.homeUrl + 'ajax.py',
type: 'POST',
data: {action: 'importMappings'},
dataType: 'json',
success: submitResults
});

I have a button with a click handler that calls a function to execute this code. The error I get is (in the minified version of the code:

Line: 11
Error: Object doesn't support this property or method

The highlighted portion of the plugin when I click to debug is:

if(u&&!/MSIE [678]/.test(navigator.userAgent)&&(u=e(u).get()),s&&(i=e(':input[form="'+s+'"]').get(),i.length&&(u=(u||[]).concat(i))),!u||!u.length)

Any idea why I'm getting this error and how to fix it? I'm open to using other methods of of form submission.

Replies(3)

jakecigar

Re: jQuery Form IE8

7 years ago

Cross domain + ie 8 + some minimized script = NO.

Share a link to your page.

JΛ̊KE

porky123

Re: jQuery Form IE8

7 years ago

The unminified code:

if (els && !/MSIE [678]/.test(navigator.userAgent)) { // #390
els = $(els).get(); // convert to standard array
}
// #386; account for inputs outside the form which use the 'form' attribute
if ( formId ) {
els2 = $(':input[form="' + formId + '"]').get(); // hat tip @thet
if ( els2.length ) {
els = (els || []).concat(els2);
}
}

The problem seems to be that els is a DispHTMLFormElement. We need it to be an array. It should go into that if statement but their regex matches the IE8 user agent so it skips it. I don't like modifying third party libraries but commenting out the user agent matching solves my problem.

https://github.com/malsup/form/issues/390

jakecigar

Re: jQuery Form IE8

7 years ago

You commented on the github. Let’s see what Mike Alsup says. Keep us posted. Future generations of programmers may have similar needs.

JΛ̊KE

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